Research On Secure Routing Based On Trust Mechanism For Wireless Sensor Networks

With the continuous development of artificial intelligence and big data,wireless communications will gradually achieve all things connected.Wireless Sensor Networks(WSNs),which consist of a large number of low-cost and low-power sensor nodes,have also received enough attention and development.However,WSNs are often deployed in open environments and are vulnerable to attacks from outside,so network security issues are very important.The traditional encryption authentication defense system cannot solve the internal attacks that the nodes are captured Trust mechanism for WSNs has become a research hotspot because of its lightweight and strong defense capability internal attacks characteristics.The routing protocol is the basis for ensuring the normal communication of WSNs.The clustering routing protocol is widely used due to its scalability and low energy consumption.WSNs trust model will be designed.On this basis,clustering routing protocol that takes into account security and network energy consumption is proposed.The research contents are as follows:1.Aiming at trust factor is simpler for WSNs trust model,a multi-factor trust evaluation model for WSNs against trust attacks is proposed.First,four trust factors are selected from the perspective of data security,variable weight fuzzy comprehensive evaluation model is used.Fluctuation factor is defined based on the feature of on-off attacks.Then,for bad mouth attacks and collusion attacks in the indirect trust which provide false trust values,using fuzzy closeness theory,nodes that deviate from the center value will be filtered.Follwing,according to the deviation degree,the weight distribution scheme is designed,and the indirect trust value is obtained.Finally,the current comprehensive trust value is integrated with the historical trust value to obtain comprehensive trust value.The results of simulation in Matlab show that the trust value obtained by the proposed trust model is more accurate,which meets the basic requirements of trust and can better resist the attack of trust model.2.Aiming at internal data security and overall energy consumption for WSNs,a secure unequal clustering routing protocol based on node trust(SUCR-T)is proposed.The decision trust value proposed in the previous point is introduced into the cluster head election,node clustering stage and inter-cluster routing stage to ensure the WSNs security.According to its own conditions,the cluster head node using a fuzzy logic system dynamically adjusts the cluster radius.The security cluster head primary selection is performed according to the trust value of the candidate cluster head node.Next design the clustering factor according to the trust factor,density factor and distance factor of candidate cluster head node.Members select cluster head node according to the clustering factor,and cluster head node also excludes the clustering request of the node with low trust value.In the inter-cluster routing,considering node security,node energy consumption and balanced load energy consumption,the relay factor is designed.Cluster head node will select next hop cluster head node to forward the data according to the relay factor.At the same time,the next hop node will also reject the forwarding request of cluster head node with a lower trust value.Through simulation,this protocol can ensure data safe transmission and data security transmission,prolong network life.